#include <misc.h>
#include <preproc.h>
module Hydrology2Mod 1
!-----------------------------------------------------------------------
!BOP
!
! !MODULE: Hydrology2Mod
!
! !DESCRIPTION:
! Calculation of soil/snow hydrology.
!
! !PUBLIC TYPES:
implicit none
save
!
! !PUBLIC MEMBER FUNCTIONS:
public :: Hydrology2 ! Calculates soil/snow hydrology
!
! !REVISION HISTORY:
! 2/28/02 Peter Thornton: Migrated to new data structures.
! 7/12/03 Forrest Hoffman ,Mariana Vertenstein : Migrated to vector code
! 11/05/03 Peter Thornton: Added calculation of soil water potential
! for use in CN phenology code.
! 04/25/07 Keith Oleson: CLM3.5 Hydrology
!
!EOP
!-----------------------------------------------------------------------
contains
!-----------------------------------------------------------------------
!BOP
!
! !IROUTINE: Hydrology2
!
! !INTERFACE:
subroutine Hydrology2(lbc, ubc, lbp, ubp, & 1,22
num_nolakec, filter_nolakec, &
num_hydrologyc, filter_hydrologyc, &
num_urbanc, filter_urbanc, &
num_snowc, filter_snowc, &
num_nosnowc, filter_nosnowc)
!
! !DESCRIPTION:
! This is the main subroutine to execute the calculation of soil/snow
! hydrology
! Calling sequence is:
! Hydrology2: surface hydrology driver
! -> SnowWater: change of snow mass and snow water onto soil
! -> SurfaceRunoff: surface runoff
! -> Infiltration: infiltration into surface soil layer
! -> SoilWater: soil water movement between layers
! -> Tridiagonal tridiagonal matrix solution
! -> Drainage: subsurface runoff
! -> SnowCompaction: compaction of snow layers
! -> CombineSnowLayers: combine snow layers that are thinner than minimum
! -> DivideSnowLayers: subdivide snow layers that are thicker than maximum
!
! !USES:
use shr_kind_mod, only: r8 => shr_kind_r8
use clmtype
use clm_atmlnd , only : clm_a2l
use clm_varcon , only : denh2o, denice, spval, &
istice, istwet, istsoil, isturb, istice_mec, &
icol_roof, icol_road_imperv, icol_road_perv, icol_sunwall, &
icol_shadewall
use clm_varcon , only : istice_mec
use clm_varctl , only : glc_dyntopo
use clm_varpar , only : nlevgrnd, nlevsno, nlevsoi
use SnowHydrologyMod, only : SnowCompaction, CombineSnowLayers, DivideSnowLayers, &
SnowWater, BuildSnowFilter
use SoilHydrologyMod, only : Infiltration, SoilWater, Drainage, SurfaceRunoff
use clm_time_manager, only : get_step_size, get_nstep, is_perpetual
!
! !ARGUMENTS:
implicit none
integer, intent(in) :: lbc, ubc ! column bounds
integer, intent(in) :: lbp, ubp ! pft bounds
integer, intent(in) :: num_nolakec ! number of column non-lake points in column filter
integer, intent(in) :: filter_nolakec(ubc-lbc+1) ! column filter for non-lake points
integer, intent(in) :: num_hydrologyc ! number of column soil points in column filter
integer, intent(in) :: filter_hydrologyc(ubc-lbc+1)! column filter for soil points
integer, intent(in) :: num_urbanc ! number of column urban points in column filter
integer, intent(in) :: filter_urbanc(ubc-lbc+1) ! column filter for urban points
integer :: num_snowc ! number of column snow points
integer :: filter_snowc(ubc-lbc+1) ! column filter for snow points
integer :: num_nosnowc ! number of column non-snow points
integer :: filter_nosnowc(ubc-lbc+1) ! column filter for non-snow points
!
! !CALLED FROM:
! subroutine clm_driver1
!
! !REVISION HISTORY:
! Created by Mariana Vertenstein
!
! !LOCAL VARIABLES:
!
! local pointers to implicit in arguments
!
integer , pointer :: cgridcell(:) ! column's gridcell
integer , pointer :: clandunit(:) ! column's landunit
integer , pointer :: ityplun(:) ! landunit type
integer , pointer :: ctype(:) ! column type
integer , pointer :: snl(:) ! number of snow layers
real(r8), pointer :: h2ocan(:) ! canopy water (mm H2O)
real(r8), pointer :: h2osno(:) ! snow water (mm H2O)
real(r8), pointer :: watsat(:,:) ! volumetric soil water at saturation (porosity)
real(r8), pointer :: sucsat(:,:) ! minimum soil suction (mm)
real(r8), pointer :: bsw(:,:) ! Clapp and Hornberger "b"
real(r8), pointer :: z(:,:) ! layer depth (m)
real(r8), pointer :: forc_rain(:) ! rain rate [mm/s]
real(r8), pointer :: forc_snow(:) ! snow rate [mm/s]
real(r8), pointer :: begwb(:) ! water mass begining of the time step
real(r8), pointer :: qflx_evap_tot(:) ! qflx_evap_soi + qflx_evap_veg + qflx_tran_veg
real(r8), pointer :: bsw2(:,:) ! Clapp and Hornberger "b" for CN code
real(r8), pointer :: psisat(:,:) ! soil water potential at saturation for CN code (MPa)
real(r8), pointer :: vwcsat(:,:) ! volumetric water content at saturation for CN code (m3/m3)
!
! local pointers to implicit inout arguments
!
real(r8), pointer :: dz(:,:) ! layer thickness depth (m)
real(r8), pointer :: zi(:,:) ! interface depth (m)
real(r8), pointer :: zwt(:) ! water table depth (m)
real(r8), pointer :: fcov(:) ! fractional impermeable area
real(r8), pointer :: fsat(:) ! fractional area with water table at surface
real(r8), pointer :: wa(:) ! water in the unconfined aquifer (mm)
real(r8), pointer :: qcharge(:) ! aquifer recharge rate (mm/s)
real(r8), pointer :: smp_l(:,:) ! soil matrix potential [mm]
real(r8), pointer :: hk_l(:,:) ! hydraulic conductivity (mm/s)
real(r8), pointer :: qflx_rsub_sat(:) ! soil saturation excess [mm h2o/s]
!
! local pointers to implicit out arguments
!
real(r8), pointer :: endwb(:) ! water mass end of the time step
real(r8), pointer :: wf(:) ! soil water as frac. of whc for top 0.5 m
real(r8), pointer :: snowice(:) ! average snow ice lens
real(r8), pointer :: snowliq(:) ! average snow liquid water
real(r8), pointer :: t_grnd(:) ! ground temperature (Kelvin)
real(r8), pointer :: t_soisno(:,:) ! soil temperature (Kelvin)
real(r8), pointer :: h2osoi_ice(:,:) ! ice lens (kg/m2)
real(r8), pointer :: h2osoi_liq(:,:) ! liquid water (kg/m2)
real(r8), pointer :: t_soi_10cm(:) ! soil temperature in top 10cm of soil (Kelvin)
real(r8), pointer :: h2osoi_liqice_10cm(:) ! liquid water + ice lens in top 10cm of soil (kg/m2)
real(r8), pointer :: h2osoi_vol(:,:) ! volumetric soil water (0<=h2osoi_vol<=watsat) [m3/m3]
real(r8), pointer :: qflx_drain(:) ! sub-surface runoff (mm H2O /s)
real(r8), pointer :: qflx_surf(:) ! surface runoff (mm H2O /s)
real(r8), pointer :: qflx_infl(:) ! infiltration (mm H2O /s)
real(r8), pointer :: qflx_qrgwl(:) ! qflx_surf at glaciers, wetlands, lakes
real(r8), pointer :: qflx_runoff(:) ! total runoff (qflx_drain+qflx_surf+qflx_qrgwl) (mm H2O /s)
real(r8), pointer :: qflx_runoff_u(:) ! Urban total runoff (qflx_drain+qflx_surf) (mm H2O /s)
real(r8), pointer :: qflx_runoff_r(:) ! Rural total runoff (qflx_drain+qflx_surf+qflx_qrgwl) (mm H2O /s)
real(r8), pointer :: t_grnd_u(:) ! Urban ground temperature (Kelvin)
real(r8), pointer :: t_grnd_r(:) ! Rural ground temperature (Kelvin)
real(r8), pointer :: qflx_snwcp_ice(:)! excess snowfall due to snow capping (mm H2O /s) [+]`
real(r8), pointer :: soilpsi(:,:) ! soil water potential in each soil layer (MPa)
real(r8), pointer :: snot_top(:) ! snow temperature in top layer (col) [K]
real(r8), pointer :: dTdz_top(:) ! temperature gradient in top layer (col) [K m-1]
real(r8), pointer :: snw_rds(:,:) ! effective snow grain radius (col,lyr) [microns, m^-6]
real(r8), pointer :: snw_rds_top(:) ! effective snow grain size, top layer(col) [microns]
real(r8), pointer :: sno_liq_top(:) ! liquid water fraction in top snow layer (col) [frc]
real(r8), pointer :: frac_sno(:) ! snow cover fraction (col) [frc]
real(r8), pointer :: h2osno_top(:) ! mass of snow in top layer (col) [kg]
real(r8), pointer :: mss_bcpho(:,:) ! mass of hydrophobic BC in snow (col,lyr) [kg]
real(r8), pointer :: mss_bcphi(:,:) ! mass of hydrophillic BC in snow (col,lyr) [kg]
real(r8), pointer :: mss_bctot(:,:) ! total mass of BC (pho+phi) (col,lyr) [kg]
real(r8), pointer :: mss_bc_col(:) ! total mass of BC in snow column (col) [kg]
real(r8), pointer :: mss_bc_top(:) ! total mass of BC in top snow layer (col) [kg]
real(r8), pointer :: mss_cnc_bcphi(:,:) ! mass concentration of BC species 1 (col,lyr) [kg/kg]
real(r8), pointer :: mss_cnc_bcpho(:,:) ! mass concentration of BC species 2 (col,lyr) [kg/kg]
real(r8), pointer :: mss_ocpho(:,:) ! mass of hydrophobic OC in snow (col,lyr) [kg]
real(r8), pointer :: mss_ocphi(:,:) ! mass of hydrophillic OC in snow (col,lyr) [kg]
real(r8), pointer :: mss_octot(:,:) ! total mass of OC (pho+phi) (col,lyr) [kg]
real(r8), pointer :: mss_oc_col(:) ! total mass of OC in snow column (col) [kg]
real(r8), pointer :: mss_oc_top(:) ! total mass of OC in top snow layer (col) [kg]
real(r8), pointer :: mss_cnc_ocphi(:,:) ! mass concentration of OC species 1 (col,lyr) [kg/kg]
real(r8), pointer :: mss_cnc_ocpho(:,:) ! mass concentration of OC species 2 (col,lyr) [kg/kg]
real(r8), pointer :: mss_dst1(:,:) ! mass of dust species 1 in snow (col,lyr) [kg]
real(r8), pointer :: mss_dst2(:,:) ! mass of dust species 2 in snow (col,lyr) [kg]
real(r8), pointer :: mss_dst3(:,:) ! mass of dust species 3 in snow (col,lyr) [kg]
real(r8), pointer :: mss_dst4(:,:) ! mass of dust species 4 in snow (col,lyr) [kg]
real(r8), pointer :: mss_dsttot(:,:) ! total mass of dust in snow (col,lyr) [kg]
real(r8), pointer :: mss_dst_col(:) ! total mass of dust in snow column (col) [kg]
real(r8), pointer :: mss_dst_top(:) ! total mass of dust in top snow layer (col) [kg]
real(r8), pointer :: mss_cnc_dst1(:,:) ! mass concentration of dust species 1 (col,lyr) [kg/kg]
real(r8), pointer :: mss_cnc_dst2(:,:) ! mass concentration of dust species 2 (col,lyr) [kg/kg]
real(r8), pointer :: mss_cnc_dst3(:,:) ! mass concentration of dust species 3 (col,lyr) [kg/kg]
real(r8), pointer :: mss_cnc_dst4(:,:) ! mass concentration of dust species 4 (col,lyr) [kg/kg]
logical , pointer :: do_capsnow(:) ! true => do snow capping
real(r8), pointer :: qflx_glcice(:) ! flux of new glacier ice (mm H2O /s)
!
!
! !OTHER LOCAL VARIABLES:
!EOP
!
integer :: g,l,c,j,fc ! indices
integer :: nstep ! time step number
real(r8) :: dtime ! land model time step (sec)
real(r8) :: vol_liq(lbc:ubc,1:nlevgrnd)! partial volume of liquid water in layer
real(r8) :: icefrac(lbc:ubc,1:nlevgrnd)! ice fraction in layer
real(r8) :: dwat(lbc:ubc,1:nlevgrnd) ! change in soil water
real(r8) :: hk(lbc:ubc,1:nlevgrnd) ! hydraulic conductivity (mm h2o/s)
real(r8) :: dhkdw(lbc:ubc,1:nlevgrnd) ! d(hk)/d(vol_liq)
real(r8) :: psi,vwc,fsattmp ! temporary variables for soilpsi calculation
#if (defined CN) || (defined CASA)
real(r8) :: watdry ! temporary
real(r8) :: rwat(lbc:ubc) ! soil water wgted by depth to maximum depth of 0.5 m
real(r8) :: swat(lbc:ubc) ! same as rwat but at saturation
real(r8) :: rz(lbc:ubc) ! thickness of soil layers contributing to rwat (m)
real(r8) :: tsw ! volumetric soil water to 0.5 m
real(r8) :: stsw ! volumetric soil water to 0.5 m at saturation
#endif
real(r8) :: snowmass ! liquid+ice snow mass in a layer [kg/m2]
real(r8) :: snowcap_scl_fct ! temporary factor used to correct for snow capping
real(r8) :: fracl ! fraction of soil layer contributing to 10cm total soil water
!-----------------------------------------------------------------------
! Assign local pointers to derived subtypes components (gridcell-level)
forc_rain => clm_a2l%forc_rain
forc_snow => clm_a2l%forc_snow
! Assign local pointers to derived subtypes components (landunit-level)
ityplun => clm3%g%l%itype
! Assign local pointers to derived subtypes components (column-level)
cgridcell => clm3%g%l%c%gridcell
clandunit => clm3%g%l%c%landunit
ctype => clm3%g%l%c%itype
snl => clm3%g%l%c%cps%snl
t_grnd => clm3%g%l%c%ces%t_grnd
h2ocan => clm3%g%l%c%cws%pws_a%h2ocan
h2osno => clm3%g%l%c%cws%h2osno
wf => clm3%g%l%c%cps%wf
snowice => clm3%g%l%c%cws%snowice
snowliq => clm3%g%l%c%cws%snowliq
zwt => clm3%g%l%c%cws%zwt
fcov => clm3%g%l%c%cws%fcov
fsat => clm3%g%l%c%cws%fsat
wa => clm3%g%l%c%cws%wa
qcharge => clm3%g%l%c%cws%qcharge
watsat => clm3%g%l%c%cps%watsat
sucsat => clm3%g%l%c%cps%sucsat
bsw => clm3%g%l%c%cps%bsw
z => clm3%g%l%c%cps%z
dz => clm3%g%l%c%cps%dz
zi => clm3%g%l%c%cps%zi
t_soisno => clm3%g%l%c%ces%t_soisno
h2osoi_ice => clm3%g%l%c%cws%h2osoi_ice
h2osoi_liq => clm3%g%l%c%cws%h2osoi_liq
h2osoi_vol => clm3%g%l%c%cws%h2osoi_vol
t_soi_10cm => clm3%g%l%c%ces%t_soi_10cm
h2osoi_liqice_10cm => clm3%g%l%c%cws%h2osoi_liqice_10cm
qflx_evap_tot => clm3%g%l%c%cwf%pwf_a%qflx_evap_tot
qflx_drain => clm3%g%l%c%cwf%qflx_drain
qflx_surf => clm3%g%l%c%cwf%qflx_surf
qflx_infl => clm3%g%l%c%cwf%qflx_infl
qflx_qrgwl => clm3%g%l%c%cwf%qflx_qrgwl
endwb => clm3%g%l%c%cwbal%endwb
begwb => clm3%g%l%c%cwbal%begwb
bsw2 => clm3%g%l%c%cps%bsw2
psisat => clm3%g%l%c%cps%psisat
vwcsat => clm3%g%l%c%cps%vwcsat
soilpsi => clm3%g%l%c%cps%soilpsi
smp_l => clm3%g%l%c%cws%smp_l
hk_l => clm3%g%l%c%cws%hk_l
qflx_rsub_sat => clm3%g%l%c%cwf%qflx_rsub_sat
qflx_runoff => clm3%g%l%c%cwf%qflx_runoff
qflx_runoff_u => clm3%g%l%c%cwf%qflx_runoff_u
qflx_runoff_r => clm3%g%l%c%cwf%qflx_runoff_r
t_grnd_u => clm3%g%l%c%ces%t_grnd_u
t_grnd_r => clm3%g%l%c%ces%t_grnd_r
snot_top => clm3%g%l%c%cps%snot_top
dTdz_top => clm3%g%l%c%cps%dTdz_top
snw_rds => clm3%g%l%c%cps%snw_rds
snw_rds_top => clm3%g%l%c%cps%snw_rds_top
sno_liq_top => clm3%g%l%c%cps%sno_liq_top
frac_sno => clm3%g%l%c%cps%frac_sno
h2osno_top => clm3%g%l%c%cps%h2osno_top
mss_bcpho => clm3%g%l%c%cps%mss_bcpho
mss_bcphi => clm3%g%l%c%cps%mss_bcphi
mss_bctot => clm3%g%l%c%cps%mss_bctot
mss_bc_col => clm3%g%l%c%cps%mss_bc_col
mss_bc_top => clm3%g%l%c%cps%mss_bc_top
mss_cnc_bcphi => clm3%g%l%c%cps%mss_cnc_bcphi
mss_cnc_bcpho => clm3%g%l%c%cps%mss_cnc_bcpho
mss_ocpho => clm3%g%l%c%cps%mss_ocpho
mss_ocphi => clm3%g%l%c%cps%mss_ocphi
mss_octot => clm3%g%l%c%cps%mss_octot
mss_oc_col => clm3%g%l%c%cps%mss_oc_col
mss_oc_top => clm3%g%l%c%cps%mss_oc_top
mss_cnc_ocphi => clm3%g%l%c%cps%mss_cnc_ocphi
mss_cnc_ocpho => clm3%g%l%c%cps%mss_cnc_ocpho
mss_dst1 => clm3%g%l%c%cps%mss_dst1
mss_dst2 => clm3%g%l%c%cps%mss_dst2
mss_dst3 => clm3%g%l%c%cps%mss_dst3
mss_dst4 => clm3%g%l%c%cps%mss_dst4
mss_dsttot => clm3%g%l%c%cps%mss_dsttot
mss_dst_col => clm3%g%l%c%cps%mss_dst_col
mss_dst_top => clm3%g%l%c%cps%mss_dst_top
mss_cnc_dst1 => clm3%g%l%c%cps%mss_cnc_dst1
mss_cnc_dst2 => clm3%g%l%c%cps%mss_cnc_dst2
mss_cnc_dst3 => clm3%g%l%c%cps%mss_cnc_dst3
mss_cnc_dst4 => clm3%g%l%c%cps%mss_cnc_dst4
do_capsnow => clm3%g%l%c%cps%do_capsnow
qflx_snwcp_ice => clm3%g%l%c%cwf%pwf_a%qflx_snwcp_ice
qflx_glcice => clm3%g%l%c%cwf%qflx_glcice
! Determine time step and step size
nstep = get_nstep()
dtime = get_step_size()
! Determine initial snow/no-snow filters (will be modified possibly by
! routines CombineSnowLayers and DivideSnowLayers below
call BuildSnowFilter(lbc, ubc, num_nolakec, filter_nolakec, &
num_snowc, filter_snowc, num_nosnowc, filter_nosnowc)
! Determine the change of snow mass and the snow water onto soil
call SnowWater(lbc, ubc, num_snowc, filter_snowc, num_nosnowc, filter_nosnowc)
! Determine soil hydrology
call SurfaceRunoff(lbc, ubc, lbp, ubp, num_hydrologyc, filter_hydrologyc, &
num_urbanc, filter_urbanc, &
vol_liq, icefrac )
call Infiltration(lbc, ubc, num_hydrologyc, filter_hydrologyc, &
num_urbanc, filter_urbanc)
call SoilWater(lbc, ubc, num_hydrologyc, filter_hydrologyc, &
num_urbanc, filter_urbanc, &
vol_liq, dwat, hk, dhkdw)
call Drainage(lbc, ubc, num_hydrologyc, filter_hydrologyc, &
num_urbanc, filter_urbanc, &
vol_liq, hk, icefrac)
if (.not. is_perpetual()) then
! Natural compaction and metamorphosis.
call SnowCompaction(lbc, ubc, num_snowc, filter_snowc)
! Combine thin snow elements
call CombineSnowLayers(lbc, ubc, num_snowc, filter_snowc)
! Divide thick snow elements
call DivideSnowLayers(lbc, ubc, num_snowc, filter_snowc)
else
do fc = 1, num_snowc
c = filter_snowc(fc)
h2osno(c) = 0._r8
end do
do j = -nlevsno+1,0
do fc = 1, num_snowc
c = filter_snowc(fc)
if (j >= snl(c)+1) then
h2osno(c) = h2osno(c) + h2osoi_ice(c,j) + h2osoi_liq(c,j)
end if
end do
end do
end if
! Set empty snow layers to zero
do j = -nlevsno+1,0
do fc = 1, num_snowc
c = filter_snowc(fc)
if (j <= snl(c) .and. snl(c) > -nlevsno) then
h2osoi_ice(c,j) = 0._r8
h2osoi_liq(c,j) = 0._r8
t_soisno(c,j) = 0._r8
dz(c,j) = 0._r8
z(c,j) = 0._r8
zi(c,j-1) = 0._r8
end if
end do
end do
! Build new snow filter
call BuildSnowFilter(lbc, ubc, num_nolakec, filter_nolakec, &
num_snowc, filter_snowc, num_nosnowc, filter_nosnowc)
! Vertically average t_soisno and sum of h2osoi_liq and h2osoi_ice
! over all snow layers for history output
do fc = 1, num_snowc
c = filter_snowc(fc)
snowice(c) = 0._r8
snowliq(c) = 0._r8
end do
do fc = 1, num_nosnowc
c = filter_nosnowc(fc)
snowice(c) = spval
snowliq(c) = spval
end do
do j = -nlevsno+1, 0
do fc = 1, num_snowc
c = filter_snowc(fc)
if (j >= snl(c)+1) then
snowice(c) = snowice(c) + h2osoi_ice(c,j)
snowliq(c) = snowliq(c) + h2osoi_liq(c,j)
end if
end do
end do
! Determine ground temperature, ending water balance and volumetric soil water
! Calculate soil temperature and total water (liq+ice) in top 10cm of soil
do fc = 1, num_nolakec
c = filter_nolakec(fc)
l = clandunit(c)
if (ityplun(l) /= isturb) then
t_soi_10cm(c) = 0._r8
h2osoi_liqice_10cm(c) = 0._r8
end if
end do
do j = 1, nlevsoi
do fc = 1, num_nolakec
c = filter_nolakec(fc)
l = clandunit(c)
if (ityplun(l) /= isturb) then
if (zi(c,j) <= 0.1_r8) then
fracl = 1._r8
t_soi_10cm(c) = t_soi_10cm(c) + t_soisno(c,j)*dz(c,j)*fracl
h2osoi_liqice_10cm(c) = h2osoi_liqice_10cm(c) + (h2osoi_liq(c,j)+h2osoi_ice(c,j))* &
fracl
else
if (zi(c,j) > 0.1_r8 .and. zi(c,j-1) .lt. 0.1_r8) then
fracl = (0.1_r8 - zi(c,j-1))/dz(c,j)
t_soi_10cm(c) = t_soi_10cm(c) + t_soisno(c,j)*dz(c,j)*fracl
h2osoi_liqice_10cm(c) = h2osoi_liqice_10cm(c) + (h2osoi_liq(c,j)+h2osoi_ice(c,j))* &
fracl
end if
end if
end if
end do
end do
do fc = 1, num_nolakec
c = filter_nolakec(fc)
l = clandunit(c)
t_grnd(c) = t_soisno(c,snl(c)+1)
if (ityplun(l) /= isturb) then
t_soi_10cm(c) = t_soi_10cm(c)/0.1_r8
end if
if (ityplun(l)==isturb) then
t_grnd_u(c) = t_soisno(c,snl(c)+1)
end if
if (ityplun(l)==istsoil) then
t_grnd_r(c) = t_soisno(c,snl(c)+1)
end if
if (ctype(c) == icol_roof .or. ctype(c) == icol_sunwall &
.or. ctype(c) == icol_shadewall .or. ctype(c) == icol_road_imperv) then
endwb(c) = h2ocan(c) + h2osno(c)
else
endwb(c) = h2ocan(c) + h2osno(c) + wa(c)
end if
end do
do j = 1, nlevgrnd
do fc = 1, num_nolakec
c = filter_nolakec(fc)
endwb(c) = endwb(c) + h2osoi_ice(c,j) + h2osoi_liq(c,j)
h2osoi_vol(c,j) = h2osoi_liq(c,j)/(dz(c,j)*denh2o) + h2osoi_ice(c,j)/(dz(c,j)*denice)
end do
end do
! Determine wetland and land ice hydrology (must be placed here
! since need snow updated from CombineSnowLayers)
do fc = 1,num_nolakec
c = filter_nolakec(fc)
l = clandunit(c)
g = cgridcell(c)
if (ityplun(l)==istwet .or. ityplun(l)==istice &
.or. ityplun(l)==istice_mec) then
qflx_drain(c) = 0._r8
qflx_surf(c) = 0._r8
qflx_infl(c) = 0._r8
qflx_qrgwl(c) = forc_rain(g) + forc_snow(g) - qflx_evap_tot(c) - qflx_snwcp_ice(c) - &
(endwb(c)-begwb(c))/dtime
! For dynamic topography, add meltwater from glacier_mec ice to the runoff.
! (Negative qflx_glcice => positive contribution to runoff)
! Note: The meltwater contribution is computed in PhaseChanges (part of Biogeophysics2).
! This code will not work if Hydrology2 is called before Biogeophysics2, or if
! qflx_snwcp_ice has alread been included in qflx_glcice.
! (The snwcp flux is added to qflx_glcice later in this subroutine.)
if (glc_dyntopo .and. ityplun(l)==istice_mec) then
qflx_qrgwl(c) = qflx_qrgwl(c) - qflx_glcice(c) ! meltwater from melted ice
endif
fcov(c) = spval
fsat(c) = spval
qcharge(c) = spval
qflx_rsub_sat(c) = spval
else if (ityplun(l) == isturb .and. ctype(c) /= icol_road_perv) then
fcov(c) = spval
fsat(c) = spval
qcharge(c) = spval
qflx_rsub_sat(c) = spval
end if
! If snow exceeds the thickness limit in glacier_mec columns, convert to an ice flux.
! For dynamic glacier topography, remove qflx_snwcp_ice from the runoff.
! Note that qflx_glcice can also have a negative component from melting of bare ice,
! as computed in SoilTemperatureMod.F90
if (ityplun(l)==istice_mec) then
qflx_glcice(c) = qflx_glcice(c) + qflx_snwcp_ice(c)
! For dynamic topography, set qflx_snwcp_ice = 0 so that this ice mass does not run off.
! For static topography, qflx_glc_ice is passed to the ice sheet model, but the
! CLM runoff terms are not changed.
if (glc_dyntopo) qflx_snwcp_ice(c) = 0._r8
endif ! istice_mec
qflx_runoff(c) = qflx_drain(c) + qflx_surf(c) + qflx_qrgwl(c)
if (ityplun(l)==isturb) then
qflx_runoff_u(c) = qflx_drain(c) + qflx_surf(c)
else if (ityplun(l)==istsoil) then
qflx_runoff_r(c) = qflx_drain(c) + qflx_surf(c) + qflx_qrgwl(c)
end if
end do
#if (defined CN) || (defined CASA)
do j = 1, nlevgrnd
do fc = 1, num_hydrologyc
c = filter_hydrologyc(fc)
if (h2osoi_liq(c,j) > 0._r8) then
vwc = h2osoi_liq(c,j)/(dz(c,j)*denh2o)
! the following limit set to catch very small values of
! fractional saturation that can crash the calculation of psi
fsattmp = max(vwc/vwcsat(c,j), 0.001_r8)
psi = psisat(c,j) * (fsattmp)**bsw2(c,j)
soilpsi(c,j) = min(max(psi,-15.0_r8),0._r8)
else
soilpsi(c,j) = -15.0_r8
end if
end do
end do
#endif
#if (defined CN) || (defined CASA)
! Available soil water up to a depth of 0.5 m.
! Potentially available soil water (=whc) up to a depth of 0.5 m.
! Water content as fraction of whc up to a depth of 0.5 m.
do fc = 1, num_hydrologyc
c = filter_hydrologyc(fc)
rwat(c) = 0._r8
swat(c) = 0._r8
rz(c) = 0._r8
end do
do j = 1, nlevgrnd
do fc = 1, num_hydrologyc
c = filter_hydrologyc(fc)
!if (z(c,j)+0.5_r8*dz(c,j) <= 0.5_r8) then
if (z(c,j)+0.5_r8*dz(c,j) <= 0.05_r8) then
watdry = watsat(c,j) * (316230._r8/sucsat(c,j)) ** (-1._r8/bsw(c,j))
rwat(c) = rwat(c) + (h2osoi_vol(c,j)-watdry) * dz(c,j)
swat(c) = swat(c) + (watsat(c,j) -watdry) * dz(c,j)
rz(c) = rz(c) + dz(c,j)
end if
end do
end do
do fc = 1, num_hydrologyc
c = filter_hydrologyc(fc)
if (rz(c) /= 0._r8) then
tsw = rwat(c)/rz(c)
stsw = swat(c)/rz(c)
else
watdry = watsat(c,1) * (316230._r8/sucsat(c,1)) ** (-1._r8/bsw(c,1))
tsw = h2osoi_vol(c,1) - watdry
stsw = watsat(c,1) - watdry
end if
wf(c) = tsw/stsw
end do
#endif
! Calculate column-integrated aerosol masses, and
! mass concentrations for radiative calculations and output
! (based on new snow level state, after SnowFilter is rebuilt.
! NEEDS TO BE AFTER SnowFiler is rebuilt, otherwise there
! can be zero snow layers but an active column in filter)
do fc = 1, num_snowc
c = filter_snowc(fc)
! Zero column-integrated aerosol mass before summation
mss_bc_col(c) = 0._r8
mss_oc_col(c) = 0._r8
mss_dst_col(c) = 0._r8
do j = -nlevsno+1, 0
! layer mass of snow:
snowmass = h2osoi_ice(c,j)+h2osoi_liq(c,j)
! Correct the top layer aerosol mass to account for snow capping.
! This approach conserves the aerosol mass concentration
! (but not the aerosol amss) when snow-capping is invoked
if (j == snl(c)+1) then
if (do_capsnow(c)) then
snowcap_scl_fct = snowmass / (snowmass+(qflx_snwcp_ice(c)*dtime))
mss_bcpho(c,j) = mss_bcpho(c,j)*snowcap_scl_fct
mss_bcphi(c,j) = mss_bcphi(c,j)*snowcap_scl_fct
mss_ocpho(c,j) = mss_ocpho(c,j)*snowcap_scl_fct
mss_ocphi(c,j) = mss_ocphi(c,j)*snowcap_scl_fct
mss_dst1(c,j) = mss_dst1(c,j)*snowcap_scl_fct
mss_dst2(c,j) = mss_dst2(c,j)*snowcap_scl_fct
mss_dst3(c,j) = mss_dst3(c,j)*snowcap_scl_fct
mss_dst4(c,j) = mss_dst4(c,j)*snowcap_scl_fct
endif
endif
if (j >= snl(c)+1) then
mss_bctot(c,j) = mss_bcpho(c,j) + mss_bcphi(c,j)
mss_bc_col(c) = mss_bc_col(c) + mss_bctot(c,j)
mss_cnc_bcphi(c,j) = mss_bcphi(c,j) / snowmass
mss_cnc_bcpho(c,j) = mss_bcpho(c,j) / snowmass
mss_octot(c,j) = mss_ocpho(c,j) + mss_ocphi(c,j)
mss_oc_col(c) = mss_oc_col(c) + mss_octot(c,j)
mss_cnc_ocphi(c,j) = mss_ocphi(c,j) / snowmass
mss_cnc_ocpho(c,j) = mss_ocpho(c,j) / snowmass
mss_dsttot(c,j) = mss_dst1(c,j) + mss_dst2(c,j) + mss_dst3(c,j) + mss_dst4(c,j)
mss_dst_col(c) = mss_dst_col(c) + mss_dsttot(c,j)
mss_cnc_dst1(c,j) = mss_dst1(c,j) / snowmass
mss_cnc_dst2(c,j) = mss_dst2(c,j) / snowmass
mss_cnc_dst3(c,j) = mss_dst3(c,j) / snowmass
mss_cnc_dst4(c,j) = mss_dst4(c,j) / snowmass
else
!set variables of empty snow layers to zero
snw_rds(c,j) = 0._r8
mss_bcpho(c,j) = 0._r8
mss_bcphi(c,j) = 0._r8
mss_bctot(c,j) = 0._r8
mss_cnc_bcphi(c,j) = 0._r8
mss_cnc_bcpho(c,j) = 0._r8
mss_ocpho(c,j) = 0._r8
mss_ocphi(c,j) = 0._r8
mss_octot(c,j) = 0._r8
mss_cnc_ocphi(c,j) = 0._r8
mss_cnc_ocpho(c,j) = 0._r8
mss_dst1(c,j) = 0._r8
mss_dst2(c,j) = 0._r8
mss_dst3(c,j) = 0._r8
mss_dst4(c,j) = 0._r8
mss_dsttot(c,j) = 0._r8
mss_cnc_dst1(c,j) = 0._r8
mss_cnc_dst2(c,j) = 0._r8
mss_cnc_dst3(c,j) = 0._r8
mss_cnc_dst4(c,j) = 0._r8
endif
enddo
! top-layer diagnostics
h2osno_top(c) = h2osoi_ice(c,snl(c)+1) + h2osoi_liq(c,snl(c)+1)
mss_bc_top(c) = mss_bctot(c,snl(c)+1)
mss_oc_top(c) = mss_octot(c,snl(c)+1)
mss_dst_top(c) = mss_dsttot(c,snl(c)+1)
enddo
! Zero mass variables in columns without snow
do fc = 1, num_nosnowc
c = filter_nosnowc(fc)
h2osno_top(c) = 0._r8
snw_rds(c,:) = 0._r8
mss_bc_top(c) = 0._r8
mss_bc_col(c) = 0._r8
mss_bcpho(c,:) = 0._r8
mss_bcphi(c,:) = 0._r8
mss_bctot(c,:) = 0._r8
mss_cnc_bcphi(c,:) = 0._r8
mss_cnc_bcpho(c,:) = 0._r8
mss_oc_top(c) = 0._r8
mss_oc_col(c) = 0._r8
mss_ocpho(c,:) = 0._r8
mss_ocphi(c,:) = 0._r8
mss_octot(c,:) = 0._r8
mss_cnc_ocphi(c,:) = 0._r8
mss_cnc_ocpho(c,:) = 0._r8
mss_dst_top(c) = 0._r8
mss_dst_col(c) = 0._r8
mss_dst1(c,:) = 0._r8
mss_dst2(c,:) = 0._r8
mss_dst3(c,:) = 0._r8
mss_dst4(c,:) = 0._r8
mss_dsttot(c,:) = 0._r8
mss_cnc_dst1(c,:) = 0._r8
mss_cnc_dst2(c,:) = 0._r8
mss_cnc_dst3(c,:) = 0._r8
mss_cnc_dst4(c,:) = 0._r8
! top-layer diagnostics (spval is not averaged when computing history fields)
snot_top(c) = spval
dTdz_top(c) = spval
snw_rds_top(c) = spval
sno_liq_top(c) = spval
enddo
end subroutine Hydrology2
end module Hydrology2Mod